NSG 3336 Lecture Notes - Lecture 56: Tobramycin, Sensorineural Hearing Loss, Cisplatin
Document Summary
Gradual hearing loss that occurs when advancing age > presbycusis. Risk factors = aging, heredity, occupational noises, recreational noises, medications, illnesses, or congenital abnormalities. Pathophysiology: conductive = lesions on a main structure sensorineural = lesions present in inner ear or on the eighth cranial nerve > sensory can be reversed, while neural is permanent mixed = combination of conduction and sensorineural. Acetylsalicylic acid (aspirin) > most common with chronic or over use. Diagnostic test: otoscopic examinations > cerumen, foreign body presence, acute/chronic infection, and structural abnormalities. Pure tone threshold = audiological test conduced with air and bone conduction assessment to qualify hearing loss > patient wears headphones and multiple different frequencies are delivered. Audiometer = audiometer used to delver speci c frequencies known as pure sounds at different intensities > plots graphs on ideographs. Speech reception threshold = used to measure the intensity what which speech is recognized by a patient is able to recognize speech.
